@oo:100%;

@b:#2b2b2b;

body{
  margin: 0;
  padding: 0;
}
.box{
  width: 100%;
  height: 100vh;
  background: #000;;
  margin: auto;
}
.buu{
  width: 100vw;
  height: 20vh;
  position: absolute;
  bottom: 0;
}
.buu>button{

  width: 20vw;
  height: 6vh;
  font-weight: bolder;
  font-size: 21px;
  cursor: pointer;
  margin-left: 3%;
  /*border: 0;*/
}
.bu2{
  background: red;
  color: #ffffff;
}
.bu3{
  background: blue;
  color: #ffffff;
}
.bu4{
  background: #000;
  color: #ffffff;
}
.bu5{
  background: green;
  color: #ffffff;
}
